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Top seed Carlos Alcaraz reached the Miami Open quarter-finals with a 6-3 6-3 win over Italy's Lorenzo Musetti.

Spaniard Alcaraz, 20, will next play Bulgarian 11th seed Grigor Dimitrov, who beat Poland's 2021 champion Hubert Hurkacz 3-6 6-3 7-6 (7-3).

Italian Jannik Sinner and Russia's Daniil Medvedev also progressed.

Australian Open champion Sinner won 6-4 6-3 against Australian Christopher O'Connell, while Medvedev defeated German Dominik Koepfer 7-6 (7-5) 6-0.

Indian Wells champion Alcaraz is aiming to complete the Sunshine Double by winning the two prestigious American hard-court tournaments in the same season.

The 2022 Miami Open champion took a comfortable first set against Musetti with a double break and, after being broken in the seventh game of set two, Alcaraz responded immediately before serving out the match.

World number three Sinner, who triumphed in his first Grand Slam final in Melbourne in January, will play Czech Tomas Machac for a semi-final place.

Sinner fell a break of serve behind against 66th-ranked O'Connell but reeled off four successive games to turn around the first set, before striking early in the second.

Machac, who ended Briton Andy Murray's hopes in the third round, beat Italy's Matteo Arnaldi 6-3 6-3.

Medvedev set up a meeting with 22nd seed Nicolas Jarry, who overcame Norwegian world number eight Casper Ruud 7-6 (7-3) 6-3.